JP-2026075878-A - Power generation control system and power generation control method

Abstract

[Problem] To provide a power generation control system and a power generation control method that can improve the tracking ability of the maximum operating point while suppressing a decrease in power transmission efficiency. [Solution] The power generation control system 1 is generally configured to include a control unit 5 that acquires the generated power P output from a power generation device 2 that converts renewable energy into electrical energy, detects the voltage value v Max at the maximum operating point P Max where the power value p of the acquired generated power P is maximum at a sampling interval △t, changes the sampling interval △t based on the absolute value of the variation amount △ v between the voltage value v Max at the previous maximum operating point P Max and the voltage value v Max at the current maximum operating point P Max obtained consecutively, and detects the maximum operating point P Max at the changed sampling interval △t. [Selection Diagram] Figure 4

Inventors

• 武田 重郎
• 新美 良和
• 千賀 卓也
• 婦木 慎一郎

Assignees

• 豊田合成株式会社

Dates

Publication Date

20260511

Application Date

20241023

Claims (4)

1. A power generation control system comprising: acquiring power generated from a power generation device that converts renewable energy into electrical energy; detecting the voltage value of the maximum operating point where the acquired power value is maximized at predetermined time intervals; changing the time interval based on the absolute value of the fluctuation between the voltage value of the previous maximum operating point and the voltage value of the current maximum operating point obtained consecutively; and a control unit that detects the maximum operating point at the changed time interval.
2. The control unit detects the maximum operating point by increasing the time interval if the absolute value of the fluctuation amount is less than or equal to a threshold, and detects the maximum operating point by shortening the time interval if the absolute value of the fluctuation amount is greater than the threshold. The power generation control system according to claim 1.
3. The control unit, when increasing the time interval, increases the time interval by a preset first set time, and when shortening the time interval, shortens the time interval by a preset second set time. The power generation control system according to claim 2.
4. We acquire the generated electricity output from a power generation device that converts renewable energy into electrical energy. The voltage value at the maximum operating point where the acquired power value of the generated power is maximized is detected at predetermined time intervals. The time interval is changed based on the absolute value of the difference between the voltage value of the previous maximum operating point and the voltage value of the current maximum operating point, obtained consecutively. The maximum operating point is detected at the modified time interval. Power generation control method.

Description

This invention relates to a power generation control system and a power generation control method. Conventional technologies include power generation systems that determine the solar cell current value at which the solar cell power is maximized, based on the solar cell voltage and solar cell current (see, for example, Patent Document 1). This power generation system can improve MPPT (Maximum Power Point Tracking) efficiency. Japanese Patent Publication No. 2015-197870 Figure 1 is an example of a block diagram of a power generation control system according to an embodiment.Figure 2 shows an example of a sampling interval when the absolute value of the variation amount according to the embodiment is less than or equal to a threshold.Figure 3 shows an example of a sampling interval when the absolute value of the variation amount according to the embodiment is greater than the threshold value.Figure 4 is a flowchart showing an example of the operation of the power generation control system according to the embodiment. (Summary of the embodiment) The power generation control system according to this embodiment is generally configured to include a control unit that acquires power generated from a power generation device that converts renewable energy into electrical energy, detects the voltage value of the maximum operating point at which the power value of the acquired power generated is maximum at predetermined time intervals, changes the time interval based on the ratio of the voltage value of the previous maximum operating point obtained consecutively to the voltage value of the current maximum operating point, and detects the maximum operating point at the changed time interval. Furthermore, a power generation control method according to another embodiment includes acquiring the generated power output from a power generation device that converts renewable energy into electrical energy, detecting the voltage value of the maximum operating point where the power value of the acquired generated power is maximized at predetermined time intervals, changing the time interval based on the absolute value of the fluctuation between the voltage value of the previous maximum operating point and the voltage value of the current maximum operating point obtained consecutively, and detecting the maximum operating point at the changed time interval. This power generation control system and method change the time interval according to the absolute value of the voltage fluctuation. Therefore, compared to a case where the time interval is constant, it can improve the tracking ability of the maximum operating point while suppressing a decrease in power transmission efficiency. [Embodiment] (Overview of power generation control system 1) Figure 1 is an example of a block diagram of a power generation control system according to an embodiment. Figure 2 is a diagram showing an example of a sampling interval when the absolute value of the fluctuation amount according to the embodiment is less than or equal to a threshold. Figure 3 is a diagram showing an example of a sampling interval when the absolute value of the fluctuation amount according to the embodiment is greater than a threshold. In Figure 1, the flow of the main signals and information is indicated by arrows. In Figures 2 and 3, the vertical axis is the voltage value v and the horizontal axis is time t. The power generation control system 1 of this embodiment is configured to perform MPPT control at the start of detection, in which case the maximum operating point P Max is detected at a sampling interval Δt as a time interval. As shown in Figures 1 and 2, the power generation control system 1 is generally configured to include a control unit 5 that acquires the generated power P output from a power generation device 2 that converts renewable energy into electrical energy, detects the voltage value v Max at the maximum operating point P Max where the power value p of the acquired generated power P is maximum at a sampling interval △t, changes the sampling interval △t based on the absolute value of the variation amount △ v between the voltage value v Max at the previous maximum operating point P Max and the voltage value v Max at the current maximum operating point P Max obtained consecutively, and detects the maximum operating point P Max at the changed sampling interval △t. The power generation device 2 in this embodiment is, for example, a solar cell, but is not limited to this; any device that converts renewable energy into electrical energy, such as a wind power generator, tidal power generator, or geothermal power generator, may suffice. In this embodiment, the absolute value of the fluctuation amount Δv is, for example, the absolute value of the ratio of the voltage value v Max expressed as a percentage (%). The absolute value of this ratio is calculated as |{(v n + 1 / v n ) - 1}| × 100 (%), for example, as shown in Figure 2, when the previous voltage value v n and